My L245 has a plug about half way up on the left side of the transmission case. I fill the case until oil just starts to come out the plug hole. My file plug is on the top of the case, toward the back.
Hope this helps.
Perry
Not sure the age of yours, but mine has SN #52015 and was purchased in April of 1979. About 3400 hrs on it.
My son is on the L245 in the pic. We're trying to start the Cat 22.
Perry